. >>> the news tonight about the terror attack on the u.s. consulate in libya. six weeks ago costing four americans their lives including ambassador chris stevens. we have learned the name of a tunisia tunisian man taken into account. the white house weighed in on e-mails sent while the attack was under way. the e-mails informed them that a radical islamic group was claiming responsibilities. . >>> and back here at home, attention, shoppers, a large-scale credit carp theft is sweeping 63 stores. barnes and noble. how did thieves get into the checkout machines. pierre thomas has been investigating that today. >> reporter: today barnes and noble announced it has been the victim of a massive, sophisticated scheme targeting credit and debit cards. thieves went after these tiny devices known as pin pads we routinely use to swipe our credit and debit cards for purchases. 63 stores in nine states were hit, potentially affecting thousands of customers. each time a purchase was made the pin pad beamed the customer's private financial information to the crooks. the crooks